Fix button styling in verification bubbles

res/css/views/messages/_common_CryptoEvent.scss

@@ -43,6 +43,7 @@ limitations under the License.
     .mx_cryptoEvent_state, .mx_cryptoEvent_buttons {
         grid-column: 3;
         grid-row: 1 / 3;
+        gap: 5px;
     }
 
     .mx_cryptoEvent_buttons {

src/components/views/messages/MKeyVerificationRequest.tsx

@@ -154,7 +154,7 @@ export default class MKeyVerificationRequest extends React.Component<IProps> {
                     <AccessibleButton kind="danger" onClick={this.onRejectClicked}>
                         {_t("Decline")}
                     </AccessibleButton>
-                    <AccessibleButton onClick={this.onAcceptClicked}>
+                    <AccessibleButton kind="primary" onClick={this.onAcceptClicked}>
                         {_t("Accept")}
                     </AccessibleButton>
                 </div>);